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How to determine the age of a baby squirrel
| Neonate Squirrel | |
| Approximate Age | 1 to 3 days old |
| Skin | Pink hairless |
| Eyes | Closed solid with no slips visible |
| Ears | Sealed flat to the head |
| Weight | Approximately 15 grams |
| One to Two week old squirrel | |
| Skin | Slight greyish fur beginning |
| Eyes | Beginning to see actual slits |
| Ears | Beginning to move away from head |
| Three to four week old | |
| Skin | Fur is thicker from head to tail |
| Eyes | Eyes are developed. Eyeslits are showing signs of opening |
| Ears | Appearing to be more normal looking |
| Teeth | Lower incisors are emerging |
| Five Weeks Old | |
| Skin | Fully Furred |
| Eyes | Opening |
| Teeth | Upper incisors beginning to cut through at five weeks old |
| Movement and behavior | Starting to nibble solid foods, at this age the squirrel will not comsume much solid food but the squirrel will be trying to eat it. Crawling movement and more active |
| Six to Seven Weeks Old | |
| Hair | Tail is becoming thicker and fuller |
| Eyes | Fully opened and beginning to focus more clearly on objects. Will see signs of fright of different objects and exposure to humans. |
| Movement and behavior | Walking and beginning to play, eating solids well but still needing formula. |
| Eight to ten weeks old | |
| Movement and behavior | Very Active, climbing, jumping, hanging from hind legs. Looks like a small adult squirrel, tail is becoming very bushy especially closer to ten weeks of age. At about ten weeks old the squirrel should be able to start cracking hard shelled nuts. Weaning of formula should be done by ten weeks of age, some squirrels will wean off starting at about eight weeks of age. |
| Eleven weeks to 18 weeks | |
| Squirrels in rehab will now be in an outdoor large acclimating enclosure. At this age the squirrels look like adult squirrels though still imature from eleven to 14 weeks of age. In rehab they are ready for release at 18 weeks of age pending on health and maturity. |
