Here's my shot at it. I tried to keep as close to your original version as possible.
And the little gnats didn't get tired from playing violins, the moonlit hares were dancing and the dog howled.
"If I tell anyone about it, nobody will believe me," thought the hedgehog, and he started to look more and more intently so as to remember all the beauty and every little blade of grass.
"Here a star has fallen," he noticed, "And a blade of grass has bent to the left. Only a top remains of the fir and now it's only swimming beside the horse.
It's interesting; if the horse lies down to sleep, will she choke in the fog?"
Feel free to give your opinions, I found that I was editing it to suit my own taste.