In 99% of cases, you can determine the age of a flying squirrel by their weight.
The most accurate, better way, is knowing when they were born, or the day their eyes opened.
This list was taken from litters we’ve owned in the past, and I thought it might be a great idea to compile them and share with you.
Note: This should be used for healthy, hydrated babies and should be treated as a guide-line, not absolute method.
| Age | Weight |
| Newborn | 3 Grams |
| 4 days | 5 Grams |
| 7 days | 7 Grams |
| 9 days | 7-8 Grams |
| 12 days | 10-11 Grams |
| 14 days | 11-13 Grams |
| 17 days | 12-13 Grams |
| 19 days | 15-16 Grams |
| 21 days | 16-19 Grams |
| 28 days | Eyes Open |
| 30 days | 25-26 Grams |
| 31 days | 27-28 Grams |
| 35 days | 30-31 Grams |
| 38 days | 32-34 Grams |
| 41 days | 34-37 Grams |
| 50 days | 41-52 Grams (notice the large variation now) |
| 52 days | 43-53 Grams |
I hope this gives you an idea on how to tell the age of a flying squirrel.
ALSO SEE: Can Squirrels Eat Kiwi?
What Can I feed my Baby Squirrel?
You can feed a pinch of granola, a small piece of apple, granola, and dry (real) oatmeal to get him started.
You can spice things up with yogurt, meal worms or wax worms.
Once baby is close to the age for weaning but we give formula as long as they will take it. I use FoxValley 32/40 but it’s only available online. Many use Esbilac puppy formula with probiotics and prebiotics. It’s sold on AMAZON.
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