
My Mastiff pup went through something similar not too long ago. He was 9 month old and decided 1 day that he wasn't going to come back in after being on his walk, so he sat on the front lawn. I braced myself and told him to 'come', that went in 1 ear & out the other, as did any different strategy I tried. He then dropped to the floor so quick I thought he had passed out, but he was playing the fool, rolling on the grass and trying to eat it :( It took me 25 mins to get him in, he moved when
he wanted to :( Carying him wasn't an option, he was 56kg at the time and as soon as I tried to lift the front of him up he managed to 'clamp' himself to the ground :(
The next day I thought I would try speeding up as we got to my lawn, that didn't work. The next day my OH tried, he ran full blast towards our front door but Buster still managed to clamp to the ground & grind my husbands dash to a halt :(
The next day.....I treid cheese....... :)
Cheese, displayed at the right moment worked :) I've used treats to great success to stop Buster pulling to get to greet people, I use the treat as a distraction - to get his attention on me and then to reward. So, armed with a pocket of cheese we went for our walk. On the way home, just as our house came into view I produced a chunk of cheese and made Buster aware of what I had ('whats' this' in excited voice). He focused on the treat, as we got to our lawn I could see him think about dropping so I wiggled the treat closer to him and reapeated 'what's this' very excited while acting all 'bouncy' and jogging (gosh, my neighbouirs must think I am bonkers!!!). This kept Busters attention enough for us to get inside :) :) :)
4 days of this and I no-longer needed the treat. A few more days later I didn't need to even prompt a 'come on then' as we went the lawn :)
If you can make yourself more interesting than anything else, you can work wonders, but sometimes you have to swallow your pride ;)