I have a rotty x who is getting on for 9 this year, he weighs about 50kgs at the moment at his fitest. He gets a walk every day with some leash free time, so plenty of exercise and doesn't have any stairs to negotiate anywhere. I have noticed that when we get back from the walk he seems tired, he tends to drag behind the other dogs, and in the mornings he doesn't want to get out of his bed or out of the way when we walk along. I tried a search on here for natural therapies, and noticed that fish oil is quite common as a remedy, but how much do you give a big dog like him? I would also like to give it to the others , who are younger and not as heavy, one is 7 this year and about 25 kgs, the other is 5 and about 5kgs. Is there a limit to the amount you can give them, can you poison them with fish oil? They have seen the vet, who stated exercise was the key, they don't ever want to miss their walks.....