Injure? Hell, as long as rats and mice aren't outright poisoned by a compound in it, like dogs are by grapes, they prolly LOVE it...and it's likely better for them than lab blocks! Every rat I owned adored sweet or tasty things and would be in heaven if you gave them juice. Mine would lick drops of juice from my hand if offered, or drink from a bottle cap with obvious enjoyment.
Grapes are poisonous to dogs? I didn't know that. Can you tell me more? How poisonous? Where did you hear that? Does it matter what type of grape? Any other details? Thanks.
I did not know that grapes can kill dogs! My dogs have eaten grapes before and they seem fine. My dogs have also injested a full 2lb. box of chocolate and all the candy my son got from Halloween. Ate an entire bag of lollipops, left all of the sticks, then threw up all different colors on my white carpet. Yuk!