Our dog, 14 year Pom, normally sleeps well but she has very bad knee joints and hobbles on 3 legs. She also takes medication for epilepsy, phenol barbital and potassium bromide. She has been on this medication for most of her life. Tonight she would not settle so we thought she might be hot, so we put on the air conditioner to cooler and she did relax for a while but woke up and started to bark. She seems to have trouble moving around on her legs and we wondered if she is having pain and cannot settle. When she is picked up she does not seem like she is in pain. She continues to be unsettled and to bark, what can we do?