What spell did yout do? In my opinion it seems like you did a love spell. If you did a love spell, which is too attract love, this can happen.
My friend once did a love spell, and she thought she would get a man. But she didn't, instead she got a puppy that day, and it loved her more than any guy would have.
This may be a case, all animals are interested in energy. They can't go into it and it wont harm them usually. You may just need to get your energy back. Animals sometimes do this.