My 15 weeks old Rottweiler cross, cant travel over 10 miles without being sick. He starts salivating then you got about 5 to 10 seconds before he throws up. Tried not given him food before a journey, that somtimes works, but not everytime. Anybody elses dog do this ? Picking up motorhome saturday in bath leaving from wales to get it. Dog will be crated if i cant control his stomach for thw weekends and holiday away.