My guy is 18 months and has it.
We went in at 15 months for yearly boosters and blood. He came back positive on the snap but they didn't do a c6. Just handed us doxycycline and said see ya. So I have no idea what he started at number wise. He was completely asymptomatic.
We we thought that was that. Until about 2 weeks ago he went from running to limping to completely lame in his left front leg in 3 days. We thought he may have injured himself up north. Lymes never even crossed my mind bc the vet pretty much brushed us off and told us he'd be fine once we treated with doxy.
I went to a new vet who told me right away upon seeing him it was related to the Lyme. He had a fever too. They sedated him bc he was in so much pain he wouldn't let anyone near without trying to bite.
They did an X-ray which showed no injury so he treated it as Lyme.
He he gave us a 30 day supply of a higher dose and different kind ( capsules compared to the compounded meds the first vet gave us) of doxycycline and pain/anti inflammatory meds. He also drew blood to send off to find out his levels.
Told us if it was Lyme related we would see improvement in a couple days. It wasn't 6 hours after his first dose and he was actually walking on his leg. Still limping but actually putting weight on it. I cried. Within 24 hrs he was 100%.
We we got th results a week later and he was a 36.
What he thinks happened was the first treatment didn't take care of it like it should have. He said protocol is over 30, treat. But he respects anyone's choice to treat regardless of the number.
Its a fairly harmless med, if it were my pup I'd treat and retest in 6 months.