This month we will review research concerning pastures and foraging behaviors in horses. Most horsemen would agree that horses grazing at pasture represent the most natural way to feed a horse. Certainly it represents the most economical and the least labor intensive method of feeding. However, many owners have questions related to what or how much a horse’s is consuming when its primary source of feed is pasture grass.
This ambiguity of how much grass a horse may consume makes selecting additional concentrates or supplements more of a challenge. In addition, many horses clearly volunteer to consume pasture grass well over their nutritional needs making regulation of body condition score very difficult. The range of dry matter intake of horses on pasture has been reported to be as wide as 1.5 to 3.1% of their body weight in a 24 hour period. Usually young horses and lactating mares will be on the upper range of intake which would make sense due to their nutritional demands. Mature horses are reported to typically consume 2-2.5% of their body weight in dry matter. However, it does appear that many of our equine friends have failed to adhere to book values when given the opportunity. A recent study looking at weight gain in pastured ponies found that on average the ponies consumed 3.8% of their body weight in dry matter, with ranges of 2.9 to 4.9%. Others have also reported horses consuming as much as 5% of their body weight in dry matter! It is rather easy to see why horses can quite easily gain weight on pasture.
But what about horses which are only turned out for part of the day in an attempt to control feed intake? Is this an effective technique or do they simply manage to eat faster in their allotted grazing time? In a study which attempted to determine how much a horse can consume in an 8 hour period, horses were individually assigned to small paddocks, allowed to graze for four hours, then switched to a new paddock for an additional 4 hours. The small paddocks were then harvested to determine how much the horses consumed in the given time period. In this experiment horses were able to consume 1.3% of their body weight within an 8 hour period. In addition, their consumption rate was twice as high in the initial four hours the horses were allowed access to grazing. Therefore the horses were able to consume almost 1% of their body weight in just four hours! Thus even limited grazing can easily result in weight gain. From this data the authors concluded that for these particular grazing horses, only 9 hours of grazing was necessary to meet their energy needs.
While we know that good quality pasture can easily meet a horse’s maintenance requirements, does it provide additional benefits to the horse? In a study designed to look at the effectiveness of pasture turnout in maintaining fitness, horses which has been ridden 1-2 hours per week, 5 days per week for 12 weeks were then stalled, continued to be ridden or were turned out in a large pasture. After a 14 week period, all horses participated in a standard exercise test. This proved that the horses allowed free access to wander through a relatively large pasture maintained their fitness compared even to the horses ridden 5 days per week. Thus pasture turnout seems to be a reasonable solution during down time when the horse is not ridden for maintaining fitness. The pastured horses in this study traveled on average 10 km a day compared to 5 km per day in the horses which were ridden. This study again lends support to the value of pasture turnout.
So what if we want the fitness benefit of pasture turnout without the obesity inducing over consumption? Often the traditional answer has been to employ a grazing muzzle. In a study looking at intake rates in ponies wearing muzzles compared to their non-muzzled counterparts, muzzling resulted in an 83% decrease in overall intake. However, in just three hours, the non-muzzled ponies were able to consume 0.8% of their body weight in dry matter. This is quite similar to the observations in the previous studies. In addition, the same team of researchers found that the ponies “grew wise” to their limited access to grass and learned to increase their consumption rates during their restricted period. Therefore limited time on pasture may not be as effective for foxy ponies once they learn what you are up to! So what is our take home message? Allowing horse’s time to graze is very beneficial, not only for their mental health, but also for their physical health. However, in order to control intake and thus body condition score in our enthusiastic eaters, we made need to employ additional measures such as limited turnout or grazing muzzles.
All backyard chicken-keepers have an interest in keeping their pet chickens healthy and happy and making minor adjustments to various aspects of their care can have a significant impact on their health and longevity. There are a number of small steps that can be taken to promote the health of backyard chickens.
1. Provide the correct feed: http://www.the-chicken-chick.com/2012/11/feeding-chickens-at-different-ages.html
As basic as it sounds, chickens must be fed properly to perform optimally and to be healthy. Even though our great grandparents may have fed their flocks cracked corn or scratch, advances in science and the work of poultry nutritionists reveals that backyard chickens require much more nutritionally to live long, healthy lives, while producing maximally nutritious eggs. Chickens at different stages of development require different feed formulations. While the feed manufacturer’s recommendations for their products should always be followed, generally speaking, day old chicks through eight weeks old should be provided with starter feed. Adolescent chickens up to 18 weeks of age should be fed a grower or a flock-raiser type ration and laying hens http://www.the-chicken-chick.com/2012/01/how-hen-makes-egg-egg-oddities.html
should be fed layer ration no earlier than 18 weeks of age or the the appearance of their first egg. Layer feed contains calcium that laying hens need for eggshell production but can be detrimental to younger birds.
Pumpkins are packed with antioxidants, vitamins A, C and E, minerals including copper, calcium, potassium and phosphorus, dietary fiber and protein in the seeds. Pumpkin seeds contain 30 grams of protein per 100 grams of seeds.1 When pumpkins are in season, I make my flock “Peeps’ Pumpkin Pie,” http://www.the-chicken-chick.com/2012/10/chickens-pumpkin-seeds-and-worm
for a nutritionally power-packed treat. Unsupported claims propose feeding pumpkin seeds to chickens as a “natural dewormer,” however, there is no scientific evidence anywhere to suggest that pumpkin seeds are capable of deworming or reducing worm loads in chickens. As such, I do not rely on pumpkin seeds as a preventative measure or as a treatment option in my flock. I give my chickens pumpkins and pumpkin seeds simply because they’re nutritious and they enjoy them.
Homemade Flock Block Substitute- http://www.the-chicken-chick.com/2012/10/flock-block-substitute-recipe-healthy.html
Flock Block is a commercially available treat for chickens that is intended to entertain them and fulfill their natural pecking instincts.They can be purchased at feed stores for approximately $13. I have purchased the product once or twice, but have always thought I could make a similar treat myself. I made my own treat block recently and am much happier knowing that my homemade Flock Block Substitute http://www.the-chicken-chick.com/2012/10/flock-block-substitute-recipe-healthy.html
is a healthy, fresh, nutritious treat for my flock. The recipe includes Omega Ultra Egg, which increases Omega-3 levels in eggs, improves laying rates and chickens’ health and lends naturally occurring amino acids to the recipe, which serve as important building blocks of the protein in feathers and eggs.
A note about scratch. Scratch is affectionately referred to as ‘chicken crack’ for a reason; chickens love it, can’t get enough of it and it’s not the best choice for them. Scratch typically consists of cracked corn and a mixture of grains, which tends to lack an appreciable amount of protein, vitamins and minerals. Scratch should be thought of as chicken candy and only given in small amounts occasionally. *Scratch should not be mixed into the flock’s feed.*
3. Clean Water: http://www.the-chicken-chick.com/2012/07/the-advantages-of-poultry-nipples.html
Provide clean, fresh water to chickens at all times. Again, this sounds like common sense, but most backyard chickens drink from waterers harboring fecal matter, bacteria and other organisms that can make them sick. The solution to dirty water is employing poultry nipple waterers. “Nobody who is raising chickens professionally has used cups, bell drinkers or troughs in the past 25 years. … Nipples have been used successfully on literally billions of chickens. The professional farmers across North America have made nipple drinkers the standard for all chickens. … The disease reduction is so striking that there is no doubt which [system] is better.” http://www.the-chicken-chick.com/2012/07/the-advantages-of-poultry-nipples.html
8. Break up Broody Hens: http://www.the-chicken-chick.com/2012/05/broody-breaker-when-hens-mood-to-hatch.html
A broody hen is one that is inspired to sit on a collection of eggs until she hatches chicks. Whether she is sitting on a clutch of fertile eggs or an empty nest, she will sit and wait for chicks to hatch indefinitely. In the 21 days normally required to hatch eggs, a broody leaves her nest briefly once or twice daily to eat, drink and relieve herself, neglecting her own health for the good of her anticipated chicks. Her comb will lose color, feathers lose sheen and she will lose a noticeable amount of weight. She can tolerate this drastic change in 21 day stints, but protracted periods of broodiness are unhealthy for her. She becomes vulnerable to external parasites, malnourished and emaciated. Broody hens that will not be permitted to hatch chicks, either due to the unavailability of fertile eggs or the preference of the chicken-keeper, she should be broken/broken-up http://www.the-chicken-chick.com/2012/05/broody-breaker-when-hens-mood-to-hatch.html
as soon as possible to return them to their regular routines.
and should be avoided unless they are “seriously infested” with parasites. Even in that case, she writes, “the benefit may outweigh the danger of TEMPORARILY adding such materials” (p. 93, emphasis added).
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