Moomin,.Get rid of the 'complete food',.it obviously ain't doing the business for you, now is it?
Your dog is a predator,.so,.fecking feed it like one... Chicken carcases,.green tripe,.lamb bones,.RAW,..and see how things go.... I'm a born again BARF feeder,...and my pup looks like Bruce Lee,.only much thinner and longer,..and with different coloured eyes
Trust me....
All the best to you and yours,.CHALKWARREN....