We took out insurance in 2014 for our new pup - at that time it was £18 per month. It has subsequently gone up to £25 in 2015, £35 in 2016 and now £45 per month! In addition, the excess fee has increased from £50 to £95.
He has no existing conditions, and we have only ever made one claim which was £300 in the first year due to him eating something he shouldn't, so there is no reason that the premiums should increase so much. To be fair they paid out without a problem when we claimed, but I expect that was to encourage us to stay so they could fleece us later! I feel very lucky that he hasn't developed any conditions so we are still free to shop around.