It’s official. The Blue Dog’s fundraising slowdown was not just a symptom of the dog days of summer. Newly released public disclosure forms indicate that over September, the coalition’s PAC took in its smallest monthly total yet this year.

Our analysis of the fiscally conservative and increasingly influential Blue Dog Coalition and its funding noted that the group’s political action committee had averaged more than $176,000 in receipts from other PACs over the first half of 2009. Their monthly haul dropped to a surprisingly low $27,000 in July, rebounded somewhat in August, and but then dropped again to just $12,500 in September.

That September money came from just three donations — $5,000 from accounting and professional services giant Ernst & Young’s PAC, $2,500 from the Food Marketing Institute PAC, and $5,000 from the National Rifle Association of America Political Victory Fund.

After raising $1.1 million from January to June, the committee raised less than $87,000 between July and September — less than it brought in during any one of the preceding five months. And in just three months, the Blue Dog PAC’s monthly fundraising average dropped by more than $50,000 — probably not the sort of fiscal conservatism the 52-member coalition was hoping for.