We are staying at a pet friendly hotel while out of town on business. Snoopy's first time in a hotel with us. He never had a problem at home when we would leave him in is crate but when we leave the hotel, he barks/ yelps for at least 15 minutes after we leave, I understand this separation anxiety is very normal and it will get better. There is a product to add to his diet we are trying that we got from our pet supplier to help comfort his anxiety. It's not working yet. Any ideas?