can anyone help ,my bullmastiff dog whos just turned five does not want to stand up and wants to drink more water than he normaly does,he is eating and has not been sick and has not got the runs hejust looks so weak.please can anyone help,i am taking to the vet but im really woried i cant think straight.

Sorry just by reading your post i cant help please just keep him calm and get him to the vets asap
and i hope all goes okay please let us know.