My beagle George used to love to cuddle and would burrow under all the blankets. One of his favorite things to do. He burrow in the middle of summer on a 90 day. A few weeks ago we noticed him gaining weight and panting. We took him to the vet and found out he no longer has thyroid function. He is on medication and his levels are now normal, he has returned to hunting voles and chipmunks in our yard, but he no longer cuddles....he will come up on the bed but almost immediately jumps down. He has begin to sleep on the floor next to our bed......he NEVER did that before. If you lay next to him he leaves almost immediately. He no longer burrows. Our vet says this is just old age but it seems more than that to me. He says the panting and jumping down is just old age pain. George is only 7. Any one else experience this?