Sunday, November 6, 2011

On Fat Rabbits: The English Lop Min. Weight Change

"I am NOT fat, I'm big boned!"

Ms. Nyx eats less than 1.5 cups of feed a day along with her constant supply of hay. She has a large cage with room to stretch out, and she gets time to run around the fenced back yard. All of her five siblings fell in with their parent's weight range of 10-11.5lbs at adult weight. And somehow, Nyxie tips the scales at 15lbs- 3 pounds more than my x-large cat.

One of the reasons why I made the decision in January 2011 to stop breeding English Lops was due to the then recent Standard change in minimum weight requirement. In the past, English Lop does were required to weigh 10lbs to be shown, and bucks needed to weight in at least 9.5lbs. The .5lbs added to both the buck and does minimum weight requirement has not only forced a fair amount of breeders out of the breed due to their once showable rabbits suddenly no longer making weight, but also, in my opinion, makes for an unhealthy attitude towards breeding English Lops.

It is no secret that English Lops are not at all a hardy breed. Continuous unhealthy breeding in the breed's past has made ear infections, abscessing, and respiratory infections, among other health issues, all too common in the breed. While those issues can be dealt mainly with culling rabbits who show those symptoms out of the breeding program, one other main problem is often ignored: sore hocks. Although it is a common infliction in the English Lop breed, because sore hocks are generally viewed to be a environment-caused problem as opposed to genetics, not every breeder takes the appropriate breeding practices to be sure it doesn't show up in their lines. The truth is, while sore hocks certainly can be and often are environmentally caused, genetics play a huge role as well. A few breeds that are often genetically prone to sore hocks, for example, are Rexes, Belgian Hares, and giant breeds such as Flemish Giants.

So why is it that English Lops are so prone to sore hocks while their larger lop cousins, the French Lops, are not? Again, it's genetics. French Lops' breed type profile is Commercial Type- a breed type that is also assigned to Californians, New Zealands, Rexes, and other meat breeds that are expected to support a large, meaty rabbit. The English Lops are a Semi Arch type; their body type is simply not build to support such a large amount of weight.

Also differing between the two big Lops is fur type. French Lops have a Rollback fur type- It is supposed to be, as described in the Standard, "very thick and dense". Compare that to the Flyback fur of the English, which "must be fine and silky to the touch"- It's obvious that while French Lops will genetically have thickly furred hocks, this is simply not a physical possibility in an English Lop that correctly conforms to the Standard of Perfection for the breed.

Sore hocks are not the only weight-related issue that is seen in rabbits. Heart attacks are not uncommon in the jumbo-sized Flemish Giants, and neither are they unheard of in English Lops. I have noticed that my still-overweight rescue mini lop, Clover, has difficulty bending over to eat his cecotrophs, and I have to wonder if the joint problems that plague overweight dogs ever crop up in rabbits. It blows my mind why a breed club of a large, medium boned, fine furred breed that suffers from weight-related illnesses would even suggest, let alone vote to raise the weight limit.

So herein lies my problem with Nyx. Although she is just 3.5lbs heavier than her mother, the extra weight has an obvious effect on her. Despite living on solid flooring for the entirety of her life, Nyx does suffer from sore hocks, and I am constantly worried that they will worsen or become infected. Even in a large cage that is always kept clean and dry, she has difficultly cleaning herself, and part of her belly is bald from urine scald. Her overly large size makes for a very interesting time on the judging table, as her disproportional body shape makes her actually long ears look short, her broad head look small, and her body round and shapeless as if she is part French Lop. Though she is a sweet bunny and I adore her very much as a pet, Nyx is a perfect example of why breeders should NOT be trying to breed ginormous English Lops. Nothing good can come out of rabbits bred larger than their bodies can support, and I truly believe the decision to raise the weight limit was a poorly made one that is pointing the breed in the wrong direction.

That all said... I do not know WHY Nyx is so big. Her parents were normal-sized. Her set of grandparents I owned were normal sized. The rabbits listed on her pedigree are all under 11.5lbs. (OK, there is ONE 13 pounder, but she's listed way back there.) Her siblings were all 10-11ish lbs at adult weight, and they were all raised the exact same. She's limited fed and I try to exercise her the best I can. I can't say that her size is genetic-based, as I know of no related bunnies that ended up that big, and so I can't say she'd throw giant English Lop babies should she ever be bred. Size variation is such an interesting thing in bunnies, and something I'd love to look into more eventually- Soon as I finish campaigning my max English Lop weight idea!

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