I made a post about pet-food (this is the actual slug) and my ranking was a mess, but by chance with that same text I got a good ranking in cat food (fluctuating position 5 to 8).
Since I was ranking well in cats I decided to polish the texts (all traces of pets disappeared and everything was focused on cats) and made many other changes, but I could never get past the 4th position (I've been like this for months).
The question is, if I change the slug from pet-food to cat-food, will I completely destroy my ranking?
I've read about the subject and the theoretical answer is yes. But I would like to know if in practice that change is powerful enough to make the ranking drop and perhaps never recover.
Or would it be better to start a page from scratch with the slug cat-food and compete there?