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Red Fox and Retinol

When to spay, food, treats, illnesses, grooming, parasites, odor, Teeth, other care as it pertains to health, etc.

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TamanduaGirl
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Red Fox and Retinol

Postby TamanduaGirl » Fri May 25, 2018 4:45 pm

My fennec values were based on red fox info so here's some actual red fox info so people can better select foods for red foxes.

The recommendation for foxes based on red fox studies is 100 IU per KG of body weight per day. 200 IU started showing signs of over dose in red fox but 50-100 was the level it began being stored in the organs.

So the average 7kg fox only needs 700mgs a day. Red fox eat 0.5-1kg a day. So if eating 1kg a day they only need 700IU/kg of food

So a food with 18,000IU/kg of food is 6.8 times over the recommended amount needed

The Instinct Ultimate Protein Canine Chicken is only 11,000iu so 3.9 times needed.

Both of these are low enough if feeding some meat and veggies as well since that lowers the over all amount but you wont need organ meats unless feeding a lot of meat and veggies since either of these kibbled already have more retinol than needed.

Some foods have 30-50,000IU/kg which is really too much even for dog and cats so it's something to keep an eye out for.
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Re: Red Fox and Retinol

Postby TamanduaGirl » Wed Aug 08, 2018 2:27 pm

Adding the break down of retinol in whole prey here, using wet values rather than dry matter since that's how it is fed.

Rabbit, domestic - 1,798 IU/kg Retinol

Lizard, anolis - 1,708 IU/kg

Chicken - 12,416 IU/kg

Rat Neonatal, <10 g - 7,467 IU/kg

Rat Adult or >50g - 12,223 IU/kg

Adult Domestic Mouse - 200,000-580,000 IU/kg

Wild Mouse - 3,894 IU/kg

So an example with rats on how this works:

A baby rat under 10g is about 10 times the daily allowance of retinol for the average sized red fox, per kg of rat. An adult rat is about 17 times.

Reds need about 700IU (depending on how much they eat) per day. The actual info from the fox papers is 100iu/kg of food fed per day, with reds eating about 0.5-1kg per day.

Rats on an as fed basis:
Rat Neonatal, <10 g - 7,467 IU/kg

Rat Adult or >50g - 12,223 IU/kg

So a neonate is 74.67 )if I call the baby 10g) and an adult is 2,240 total per animal as fed(If I go by 300 grams some weigh more).

So if feeding nothing but rats you could feed 10 babies a day an adult ever 3 days. But reality is retinol is coming from other sources.

So maybe weekly would be reasonable for babies or once a month for adults but if they become a larger part of the diet it'll raise the amount per kg of the total food fed a lot more. Like an adult rat is roughly 1/4 of a 1kg daily diet but is half the daily allotment. Any extra gets stored in the organs and can lead to issue if is chronically more than needed.
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Re: Red Fox and Retinol

Postby Ash » Thu Aug 09, 2018 12:31 pm

Wow that puts things into better perspective.
3 red fox, 4 pectinata iguanas, nile monitor, BW tegu, sailfin dragon, leachie gecko, 6 snakes, salamander, 3 tarantulas

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