Depends as well if your beating or picking up or are you doing both can make a difference as a dog doing both beating and picking up especially if drive after drive n flighting as well are being put under the cosh a lot more than someone who has multiple dogs n swap n change dogs between drives or days but as long as you maintain them well then they should be fine both mine are out 4 times a week n manage ok but look after em n plough the grub into them, just picking up for excample you you can get away with a lot more jmo, as for a first season dog I wouldn't be doing anywhere near that much,