Kedinin kanadý olsaydý, serçenin adý kalmazdý.

Sýk gidersen dostuna, yatar arka üstüne.

Kaya uçmazsa dere dolmaz.

 Could it be serçe?

If a cat had wings, then the sparrow would be extinct.

Here is my attempt ReyhanL:

Sýk gidersen dostuna, yatar arka üstüne.

If you visit you friend frequently, he/she will lay down on his/her back which means do not visit someone so frequently then they will get bored and you may not shown the respect you expect.  you will be ignored and not wellcomed anymore.  friends miss each other when they do not see each other often.

Kaya uçmazsa dere dolmaz.

For extensive needs you have to make extensive sacrifices.

Thank you Toggle.