Malo (Malocclusion) is a disease when the teeth grow to long from inside....I too researched because I have heard talk and didn't know what it was ...Malo cant be cured....teeth filing and in some cases surgery can help the chin temporally....chins with that kind of condition would require a lot of care and expenses, I think chin owners who maybe have dealt with it can give more detailed information and maybe help...
Malo can cause loss of appetite, because its a tooth problem and they can be in pain they will loose weight..if my chin ever had malo I would be very sad but making decisions about putting any pet down has different factors...will vet care and treatments help ...is there medication that can be given to help with pain ....can I devote time or give chin to someone who has the time.....
I think the most important thing is to always keep a sharp eye out for symptoms of any pet when you let there symptoms that need attention go then any disease can get worse