Advise from fellow dog walkers!

Rebecca • North East, England. Mother to 2 beautiful brown eyed boys
I'm due with my first baby 31st May. We already have a pushchair travel system and are very happy with it. 
I do a lot of dog walking and we have a castle and woodland around us with lots of off-road paths.
Would you advise to get a secondary pushchair with carrycot for dog walking?