Joe77;
If you do is using a crate at home that is good and that is the training try to use the blanket and toys you will put in the crate with him and close the crate at night for the dog to get use to not be able to leave whenever he wants. Do not give any medication to the dog is very bad, with that size dog put to big water bottle attach to the crate and if you put it since now so the dog get use to drink and use them. Post a message on top and one side of the crate stating that the dog is a love family member and that any kindness will be appreciate. If the dog goes thru Japan or Hong Kong they will not take the dog out of the crate in transit is not allow by their laws other places i do not know. Oh get the absorbent cleaning blanket and put two or three in the bottom of the crate for his urine (yellow or green one)
Hope all this help