<human>: Can you provide a brief overview of the text?

We had "Max" for only 5 years when he got ill. Vets couldn't find anything wrong with him. One day he started breathing heavily with his tongue out, wouldn't eat and didn't even want to walk. It just happened out of the blue. The Vet recommended to have him put to sleep as he was in pain and we couldn't afford to have any more tests. I didn't want him being poked and prodded when he was like this.

I am looking to get another King Charles Spaniel. I love them, they are adorable, playful and friendly.

But this breed apparently  have so many health problems. Is there any way I can ensure that i bring up another dog without illness?
<bot>: Are all King Charles Spaniels born with health problems. Is there any way i can ensure that I bring another one up without problems.