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My, how fast you have grown!

4/5/2017

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PictureOur little rescue boy Joey Photo credit - Erin Crop
So many people have asked me what a rat should weigh at a given age, or how much a mama should gain during pregnancy. This varies a lot due to genetics but also to environment. You have probably noticed that we often post the weights of our ratties. This is such a great resource for us. If we have an older rat that suddenly drops weight (illness in rats move so quickly) we can usually find a problem 'before' it gets chronic. It shows us that a mama maintains her weight while feeding sometimes over a dozen babies, and if a baby is failing to thrive. Over the last couple years we have randomly tracked over 36 different babies up to 12 weeks of age (and beyond) Some were 'foster', some were emergency rescues but most were born here or added here at 6 weeks. One thing we noticed, is that even with a huge litter, on average the rats catch up with their weight at 6-8 weeks with those of a smaller litter. If you would like to see the different weights of 'healthy' babies with litter size, feel free to contact us for this information.

Here are our average weights for babies up to 12 weeks 

male/female
Week one 
 19/19 grams
Week two
32/35 grams
Week three
51/59 grams
Week four
81/93  grams
Week five (numbers off because of male rescue)
110/123 grams
Week six  
151/156 grams
Week seven
209/183 grams
Week eight
271/202 grams
Week nine
292/229 grams
Week ten
320/243 grams
Week eleven
354/266 grams
Week twelve
381/283
​ grams

​We rescued 2 boys at week 5, they came to our mischief weighing only 50 & 54 grams.  They were obviously failure to thrive due to their rescue home being hit by SDA (A very infectious virus among rodents) when they were only about a week old. We offered to help these boys with our 'magic potion' since they had not gained in almost 2 weeks. By week 6 they gained over 70 grams (in 1 week) and by week 7 they were holding their own with the rest of our mischief's weights. Once quarantine was over for these boys they actually became some of our largest boys.​

OCRA's Magic Potion for Weight Gain

We came up with this mixture after we had ZERO success with the Oxbow Critical Care our vet prescribed for an ill rattie. Critical Care is for herbivores, we might have had more luck with the Carnivore Care. The best thing about our mixture is it isn't something new for the rats. We offer them eggs every once in a while (They love to peel hard boiled) We are always offering them a mix of veggies and a few fruits. When they are not sick we also train them to take sugar water or diluted Torani syrup from a syringe. Such a great thing to teach them for if they do get ill they will already know the habit.  It is very hard to get them to take a new food because they are SO smart. In the wild they actually will send their weakest to test the new food to make sure they don't die if that isn't an option they will only take a tiny portion to make sure it is safe. If you grind up rat block, that they have already been eating, you should have much success in getting them to eat new foods with that mixed in.  

Here is what we do with our rat block

Take rat block (18% protein) put into a blender to make it into a fine flour type powder. It usually takes just a few seconds. Grind about 1/2 cup - 1 cup for several meals.  Melt tablespoon of coconut oil into skillet. Add yummy veggies and fruits (use shredded carrot, peas, avocado, shredded apple or even banana mashed up) Then add eggs to the skillet. (about 3-4 scrambled raw eggs) Once all in the skillet, sprinkle the powdered rat blocks into the skillet. Stir well, letting it all cook together on med/low with lid. If needed you can add a little water. When it is finished it is almost like a souffle. Offer this mixture to the rat needing a bit more  sustenance, keeping leftovers for a few days in fridge.  If they are really struggling,  we also add baby soy formula to the mix right before we feed them it becomes a soupy oatmeal texture.  In our opinion, soy formula is so much better for them than 'Ensure'  (full of unneeded sugars and dyes) or even puppy or kitten formula which many like to offer to those needing extra goodies. This Magic Potion has NEVER let us down for struggling weanlings, ill or elderly rats.

Rat Milk Composition
14.8% fat (by day 20 it drops to only 4.2%) 11.3% protein

Information from The Rat Fan Club on raising orphans 
Soy Formula 
25% Fat 12% Protein 
Formula for puppies
40% Fat 33% Protein 

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