I did the same but you can easily give raw with a higher fat percentage other times of the year also, by just giving less grams and increasing the percentage of vitamins/minerals, ect. 55 would be to high tho.
Same thing they do in good working kibbles like royal canin 4800. I leave some dogs on it whole year round now, keep or rest.
Some people think im crazy giving them expensive kibbles. But my bag last 1,5 time longer