Its always the way hun, this is why we promote rescues so hard on here, yes they replace the pets they re-home but its for a bloody good reason!
Its hard to turn your back on animals in need, i appreciate that and have been victim to it myself, but any bought from pet shops, breeders, gumtree or wherever, they all get replaced and the breeding and mis-treating continues. Rescues are not like that and only have the animals best interests at heart.
xx
EDIT: You are more than welcome, i had similar issues with my boy earlier this year, only worse because i didn't spot/recognise the signs quick enough the teeth had longer to grow and cause more problems. xx