11-y.o. male Shih Tzu was sick about 3 months ago. Vet diagnosed with gastroenteritis. Received fluids, shot, special food and prescription. Recovered from that but sleeping habits totally changed. He used to sleep through the night but now wants to stay awake ALL night. Paws the covers, rambles in the bed and when we get up with him, he is up for the rest of the night rambling and staring at the door, window, etc. The vet tried him on Gabapentin which made little difference if any so was changed to Trazodone. Stated with 1/2 pill then to 3/4 pill which has basically made no difference. The vets are I think at a loss as to what his problem is. If anyone has experienced the same and has a solution, it would be much appreciated. Hard for us to keep going on 2-3 hours of sleep a night. Thanks.