So sorry to hear of Liam being ill!!!! I hope he is feeling better soon - hurts to see them hurting!
So I guess the Lepto diagnosis was incorrect or is he suffering both? I never went for the Lepto vaccine with my doxies as they are sensitive, but we do have a large lepto issue in CT and lots of wildlife, a dog who loves the outdoors, well, both my sheltie boys get Lepto!
Once he is feeling better, Nature's Farmacy does have a GREAT probiotic, it's a powder but my puppers do just fine sprinkled on food. I actually use their Complete which includes 3 of their top products in 1.
Please give Liam a kiss from us - we hope he is on the mend quickly. Please keep us posted!