RPM Alamo - taking entire pet fee and rent as their profit

[Allen L.]

I have a property managed by Real Property Management Alamo for the past 8 months. I just found out that the tenant has a pet through reviewing a work order which stated that the tenant has a pet in property and spoke to RPM about it. The property manager stated that the pet addendum is between the property management company and the tenant, and I have no claim to the pet fee and the monthly pet rent. 

My fellow SA landlords, is this standard? I have properties in 3 states and this is the first time I've heard such an outrageous thing. Didn't know RPM was such a shady company. What is my recourse?