Well only two of you seemed to be brave enough to have a go.
There is no such thing a Dog GS & Dog RE but I have modified it to dog. So on a recount, Tony you have scored 9 points & come in second & Dougiebarder you have won the competition with 12 points. Well done.
I have documentary evidence that the animals marked * are/were considered suitable for service with the British Army in a pack or draught role.
*Ass
*Bullock
*Camel (single humped)
*Camel (double humped)
Cat (felix domesticus)
*Dog
*Donkey
*Elephant
Emu
Homunculus
*Jennet
Kangaroo, GS
*Mule, GS
*Mule, Pack (Sudan)
*Mule, RA
*Pony
Rhino
*Sheep
*Water buffalo
*Yak
Zebra
The sheep suprised me, yet it is rated at a 40 lb payload. The only photo of military use of sheep was found below, in search, enter "sheep sailor"
http://cas.awm.gov.au/TST2/cst.acct_master?surl=2074262539ZZWTDGQHBRUO64277&stype=2&simplesearch=&v_umo=&v_product_id=&screen_name=&screen_parms=&screen_type=RIGHT&bvers=4&bplatform=Microsoft%20Internet%20Explorer&bos=Win32