Need advice: 2 dental clinic sites + domain separation strategy + linking structure

Hi everyone,


I’m running a dental clinic business and currently working with multiple domains / projects. I need some advice on structure because things got a bit messy and I want to simplify and scale properly.


Here’s the situation:

• I had one main website focused on local dental clinic keywords (city-based intents, treatments, etc.)
• Over time, the site became a bit “blurred” with mixed keyword intents and structure issues
• I recently bought a new domain and migrated most of the structure there
• Now I’m considering keeping the old site as it is so it continues generating organic leads naturally
• And building the new site as a more controlled “main tracking + conversion + SEO experiment” platform
• I also have a separate idea for a dental tourism-focused project in the future

My questions:

1. Is it a good idea to let the old site run passively while focusing SEO + tracking on the new domain?
2. Would linking from the old domain to the new one help or hurt in this kind of setup?
3. Or should I fully consolidate everything into one strong domain instead of splitting?
4. Any experience with running separate “local clinic site + experimental SEO site” in the same niche?

Main goal is stable lead generation + scalable SEO structure without overengineering things again.


Would appreciate any advice from people who dealt with multi-domain SEO setups.


Thanks

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what about search console? what should I do to generate more clients as in blackhat strategies?

For long-term growth, consolidating into one strong domain is usually safer unless the sites target completely different intents (local clinic vs dental tourism). Keep separate Search Console properties for each domain. If you messed up, the penalties and trust loss hit much harder in health niche.

ps:
it's been almost 2 months other domain the second I bought is recieving very high rankings and the first domain rankings dropped significantly very choppy and google is now treating the second website as main one. impressions and clicks are still very very low. around 100-200 on the old one but new one is getting alot of impressions and clicks without any backlinks.