Hi there! I'm currently caring for two fox squirrels (9 weeks-11weeks) and one new Grey cat squirrel (around 3 weeks). I have put pieces of antlers, safe green tree limbs, and a sea shell in their habitat and I can't get the older two to chew on anything. I'm worried they won't be able to keep their teeth worn down if they don't start chewing! Is there anything specific I should try? They are still on fox valley formula, they right amount for their body weight. They get rodent blocks but they hate them. Luckily fox valley is sending a few samples of their products for them to try. And I give them a few soft fruits and vegetables daily for a snack. Any information is greatly appreciated!