Crickets and locus
You will need to feed them locus and crickets and they should last up to 10 days then you can leave it for 4 days the refill. Thats what I do. But geckos can live up to 4 weeks without food.
Your dog may or may not be of old age but I'm mostly affects older dogs.but of corse things can chance.Your dog proberbly has a bladder infection.The best thing is for your dog to go to the vets.but I ashure you if your dog is 4+ it could meen bad news. Good Luck.xx