I have 2 cats inside. Outside I have a very tall palm tree where a family of squirrels live. Every day I tuck crackers and old bread into the strips of bark and watch them come down to nibble. My cats love to watch. My son said he saw a huge white owl come down one night which explains the big droppings my husband has found. Looks like a ball of bones. Ugh! At least it keeps any mice away. Hopefully it's staying away from the squirrels so far.