I renewed Odie's in May with Argos Platinum for £198. This is a 'for life' policy and £7,000 per year which is decent.
TBH, it's not so much about health issues (although I'll be glad I've got it if something does happen), I'm more concerned about liability in case he, for example, runs off and causes an accident. If someone sues, where would I get millions from? It's worth it for my peace of mind....