I work alongside an SLP.  It has taken years to build communication and trust--well worth the effort.  Here are some practical mental choices that helped us:  Have clearly defined scopes; understand each others' objectives; have "permission" to question each other and brainstorm options before deciding a care plan (in front of the mother respectfully); ask each other "would you be comfortable trying..." and then why or why not; have a timeline of when things are expected to improve and when the care plan might shift; be comfortable with what you don't know; keep an open mind and trust the other department to "do their job" and allow you to do yours as well.  
If you have specific questions, you're welcome to contact me.
Amy Peterson, IBCLC 
(co-author of Balancing Breast and Bottle with "my" SLP Mindy)

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