"Going to the dogs" means going bad. You would say "Man, that shop has really gone to the dogs - I don't even want to go inside any more."
The expression 'gone to the dogs' means that someone or something exhibits very much lower standards than previously or was expected.
Origin: As far back as the 1500s, food that was not thought to be suitable for human consumption was thrown to the dogs. The expression caught on and expanded to include any person or thing that came to a bad end, was ruied, or looked terrible.
To dog means the same as to hound --- since both are dogs. When a dog/hound/wolf or other canine is hunting, it will stay on whatever it's chasing and run after it until it is exhausted. Therefore, to dog or hound means to stay on the trail, to keep after someone, not to give up until something's done.
Do what ever you want to do.
No, the idiom is only used to refer to rain.
under what headword would you find the idiom raining cats and dogs?
no an idiom would be like "it's raining cats and dogs"
A person needs to lose weight.
It originates from rabies. Rabid dogs foamed at the mouth.
There isn't an idiom "dog's tail." There are several idioms about dogs and tails, but I'm not sure which one you're thinking of.
Do what ever you want to do.
it means go to sleep
It means to go faster
No, the idiom is only used to refer to rain.
under what headword would you find the idiom raining cats and dogs?
it means to take a chance or risk
This is not an idiom. An idiom is an expression whose meaning cannot be deduced from its elements. To go through fire and water for someone is easily understood to mean to make a special effort and to undergo difficulties for that person's sake.
The idiom of going to the dogs means that any person or thing has come to a bad end, been ruined, or looks terrible.
no an idiom would be like "it's raining cats and dogs"
A person needs to lose weight.