Yes, but it's a very personal opinion that should be agreed upon by both parties. Many surrogates are willing to continue pumping for up to 6 weeks after giving birth. The baby can be fed using this milk either with a bottle or with a supplemental nursing system. This should be negotiated and included in the legal contract prior to the embryo transfer.
Also, it is possible for the intended mother to breastfeed with their own milk their babies. This process is called induced lactation and requires the intake of hormones (via birth control pills) to "trick" the body into thinking that you're pregnant. The hormones will be replaced before the baby arrives with a series of milk-producing medications and herbal supplements.