What is causing my dog's urine to smell fishy?
Cat urine has a higher ammonia content than dog urine. It is the ammonia that smells bad and stings your nose! It will also smell stronger when an animal (cat or dog) "sprays" there territory. Unaltered Male Cats and dogs will do this more often than females or altered animals. Since cats are more territorial than dogs, they will be more likely to spray than dogs.
Most dog's urine looks clear because that means that they drink enough water to be hydrated. Just like humans, the more water a dog drinks, the clearer the urine will be. Water makes up 95% of urine, meaning that your dog is drinking a healthy amount of water if their urine is clear. Sometimes it doesn't smell and that may be because your dog drinks enough water for their urine to be composed of 95%…
it is not normal for dog urine to kill grass. something is odd - either your dog has something causing unusual urine chemistry or you have very delicate grass! I have 4 dogs and have had others now departed. never did they kill grass. some plants are sensitive to urine but not common grass varieties
From a dog's point of view what must the ground smell like in order for it to be the proper place to take a poo?
If dogs urinate while you are out on a walk in the neighborhood, they are "catching up on their correspondence". Marking (with urine) is how dogs "communicate" to other dogs in the area, since they all tend to choose the same places to urinate. A dog marking a public place with urine is it's way of "dropping it's business card" on a community "desktop" for other dogs to read. Now, in your own backyard, it…
Dogs learn about other dogs through the scent they leave. Similar to when people talk to other people, dogs convey messages through scents. A dog that smells another dogs urine, can learn if that dog is male or female, if they are in heat, what the dog's temperament is, if they are healthy or sick, etc.