Privacy notice.

Effective September 8, 2026.

Browsing this website

Companion Letter is a static information site. This version has no account registration, contact form, health questionnaire, advertising pixel, or site analytics script. Its code does not set cookies or save browsing information in local storage.

The hosting infrastructure necessarily receives technical request information, such as an IP address, browser details, requested URL, and request time, to deliver pages. Retention depends on the hosting services and their configuration.

Affiliate and provider links

ESA Pet buttons pass through an affiliate tracking service before reaching the provider. That service and the provider may receive technical request and referral information and may use their own cookies or tracking technologies under their policies.

We do not receive or process the medical information or payment details you choose to enter on the provider’s site. Review the provider’s privacy notice before supplying sensitive information.

Medical information

This website has no mechanism for submitting a clinical history or requesting an assessment. Do not treat it as a clinical portal. Use the provider’s appropriate channels for appointments and service questions.

Changes and scope

This notice describes the site as supplied on the effective date. If forms, analytics, advertising, or other data features are added, the operator should update this notice to reflect those changes. Third-party websites are governed by their own notices and terms.

Read the affiliate disclosure for more about our commercial links.